CN106191459A - A kind of clean gold extraction element and method - Google Patents
A kind of clean gold extraction element and method Download PDFInfo
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- CN106191459A CN106191459A CN201610819609.0A CN201610819609A CN106191459A CN 106191459 A CN106191459 A CN 106191459A CN 201610819609 A CN201610819609 A CN 201610819609A CN 106191459 A CN106191459 A CN 106191459A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/02—Apparatus therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/12—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
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Abstract
The present invention provides a kind of clean gold extraction element and method, described clean gold extraction element to include medicine system, reactive tank, solid-liquid separation system, micro-nano bubble generator and gold adsorption system.The present invention uses micro-nano bubble to carry out gold extraction as oxidant source, can excite the substantial amounts of hydroxyl radical free radical of generation, and hydroxyl radical free radical has strong oxidizing property, is greatly improved the leaching rate of breeze.And owing to its bubble is minimum, considerably increase the mass-transfer efficiency of reaction.The present invention also uses aminoacid avirulent to environment to propose gold agent, and environment-protecting asepsis, waste water can discharge through simple process.And can adsorb on leaching limit, limit, improve production efficiency.Use the clean gold extraction element of the present invention, and use and carry the process for extracting gold of gold agent and modified PAN adsorbed film without cyanogen aminoacid and can make easily to soak the leaching rate of gold mine more than 90%, make the most pretreated Refractory Au-ores leaching rate be more than 85%.
Description
Technical field
The invention belongs to field of hydrometallurgy, relate to a kind of clean gold extraction element and method.
Background technology
Extraction of gold by cyanidation technique is the main way carrying gold from Ore or concentrate.Since New Zealand Ke Luen ore deposit in 1889
Having built up the cyanidation gold-extracted factory of First in the world, extraction of gold by cyanidation has the history of more than 100 year so far, and extraction of gold by cyanidation has back
The features such as yield height, Ore wide adaptability.But, due to the hypertoxic characteristic of cyanide so that the production of cyanide, transport, deposit
The refuse storing up, use and containing cyanide all produces grave danger to environmental and human health impacts.Its dump leaching gold-extracting is to surface water, underground
Water and soil all constitute grave danger.Current people are to environmental conservation pay attention to day by day, and therefore the use of cyanide will increasingly be subject to
To limiting.
Additionally cyanide carries golden due to refractory mineral, as the lowest, generally in the Ore leaching rate containing pyrite and mispickel
Less than 30%, it is therefore desirable to such Ore to be carried out the pretreatment of complexity, increase extraction of gold process cost and operation easier.
CN203513764U is referred to a kind of gold using thiourea and leaches blood circulation, use leaching system,
But the leaching rate of not mentioned use thiourea gold extraction, only publicity one puies forward gold blood circulation in patent.Public affairs in CN104911371A
Show that a kind of low toxicity proposes gold agent, comprised sodium hexameta phosphate 12-12.4 part, acid sodium 7-7.4 part, sodium ferrocyanide 9.4-9.8 part, sulfur
Change sodium 10.3-10.7 part, sulfur 13.3-13.7 part, sodium bromide 10.4-10.8 part, sodium chloride 6.3-6.7 part, manganese dioxide
8.2-8.6 part, carbamide 11.8-12.2 part, calcined soda for industry 9.3-9.7 part.The gold agent that carries of this patent proposition still contains Sodium cyanate (NaOCN)
And the Cyanogran. of complexation, still there is toxicity.CN1814831A discloses a kind of wet method containing the refractory gold ore such as arsenic, antimony
Pretreatment and bridge without platform method.Its bridge without platform need nonetheless remain for acid chloride oxidant and carries out pretreatment, and it carries without cyanogen
Gold uses chlorine to extract gold from as oxide isolation.
Therefore, how a kind of clean gold extraction element and method are provided, with cleaning, high efficiency extraction gold, become ability
The important technological problems that field technique personnel are urgently to be resolved hurrily.
Summary of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of clean gold extraction element and
Method, is used for solving tradition extraction of gold process and pollutes the problems such as environment, severe toxicity, the most preprocessed leaching efficiency of refractory mineral are low.
For achieving the above object and other relevant purposes, the present invention provides a kind of clean gold extraction element, described cleaning
Gold extraction element includes medicine system, reactive tank, solid-liquid separation system, micro-nano bubble generator and gold adsorption system；Its
In:
Described medicine system is connected to described reactive tank, for adding gold extractant to described reactive tank；
Described solid-liquid separation system is connected to described reactive tank and described micro-nano air Bubble generating apparatus, is used for extracting described
Mixed liquor in reactive tank, and it is divided into two-way to export after the mixed liquor of extraction is carried out solid-liquid separation, wherein a road is that breeze is dense
Contracting liquid, output to described reactive tank, another road is the clear liquor comprising less solid, and output to described micro-nano bubble produces dress
Put；
Described micro-nano air Bubble generating apparatus is connected to described solid-liquid separation system, described reactive tank and described gold absorption
System, for being mixed into air in the clear liquor from described solid-liquid separation system and producing micro-nano bubble, and will include micro-
The clear liquor of nano bubble is delivered to described reactive tank or described gold adsorption system；
Described gold adsorption system is connected to described micro-nano air Bubble generating apparatus and described reactive tank, for absorption from institute
Stating the gold ion in the clear liquor of micro-nano air Bubble generating apparatus, the clear liquor after simultaneously inhaling gold is transmitted back to described reactive tank.
Alternatively, described reactive tank is provided with PH meter, for measuring the pH value of mixed liquor in reactive tank.
Alternatively, described medicine system includes dosing tank and dosing pump；Described dosing pump is connected to described dosing tank with anti-
Answer between groove.
Alternatively, described solid-liquid separation system includes centrifugal pump and ceramic membrane separation system；Described ceramic membrane separation system
Including inlet, breeze concentrated solution outlet and pure water inlet；Described centrifugal pump one end is connected with the outlet of described reactive tank, another
End is connected to the inlet of described ceramic membrane separation system；The breeze concentrated solution outlet of described ceramic membrane separation system is connected to institute
Stating reactive tank, pure water inlet is connected to described micro-nano air Bubble generating apparatus.
Alternatively, the ceramic membrane materials that described ceramic membrane separation system uses is aluminium oxide or zirconium oxide, and aperture is 0.1-1
μm。
Alternatively, described solid-liquid separation system includes cyclone.
Alternatively, described micro-nano bubble generator includes gas-liquid mixing pump or pressure air-dissolving device.
Alternatively, a diameter of 10nm-10 μm of described micro-nano bubble.
Alternatively, described gold adsorption system uses the polyacrylonitrile nanofiber film ADSORPTION OF GOLD ion of amidoxim.
Alternatively, the polyacrylonitrile nanofiber film preparation of described amidoxim is on macromolecule non-woven fabrics.
Alternatively, the polyacrylonitrile nanofiber film of described amidoxim is rolled membrane module form.
Alternatively, described gold adsorption system includes that adsorption tank, described adsorption tank include and described micro-nano bubble generator
The charging aperture connected and the discharging opening being connected with described reactive tank；The polyacrylonitrile nanofiber film of described amidoxim is positioned over
In described adsorption tank.
Alternatively, described gold adsorption system is described rolled membrane module, and described rolled membrane module lower end is provided with micro-with described
The charging aperture that air Bubble generating apparatus of receiving connects, upper end is provided with the discharging opening being connected with described reactive tank.
Alternatively, described gold adsorption system uses activated carbon adsorption gold ion.
The present invention also provides for a kind of process for extracting gold, and it is clean that described process for extracting gold uses described in above-mentioned any one
Clean gold extraction element.
Alternatively, described process for extracting gold comprises the steps:
S1: add the powder in gold mine in described reactive tank, and gold extractant is added described by described medicine system
Reactive tank, makes described breeze reach preset concentration；
S2: close described medicine system, opens described solid-liquid separation system and described micro-nano bubble generator, makes described
Reactive tank, solid-liquid separation system and micro-nano bubble generator form closed circuit circulatory system, carry out the leaching of gold；
S3: open described gold adsorption system, carries out leaching and the absorption of gold of gold simultaneously.
Alternatively, in described step S3, close described micro-nano air Bubble generating apparatus and lead to the valve of described reactive tank,
The clear liquor including micro-nano bubble is made only to be delivered to described gold adsorption system.
Alternatively, described gold extractant is without cyanogen extractant.
Alternatively, described extractant without cyanogen comprises the aminoacid that mass fraction is 0.5%-2%, and mass fraction is 0.2%-
The alkali of 2%, solvent is water.
Alternatively, during described aminoacid includes glycine, alanine, aspartic acid, phenylalanine, leucine, histidine
One or more.
Alternatively, one or more during described alkali includes caustic soda, quick lime, Calx.
Alternatively, ozone is added as co-oxidants by the air inlet pipe of described micro-nano air Bubble generating apparatus.
Alternatively, in described reactive tank, hydrogen peroxide is added as co-oxidants.
Alternatively, in described step S1, after adding described gold extractant, the quality of breeze described in described reactive tank
Mark is 1-50%.
Alternatively, in described step S2 and step S3, in described reactive tank, the temperature of mixed liquor is 25-80 DEG C, and PH ties up
Hold at 9-13.
Alternatively, gas-liquid mixed ratio when described micro-nano air Bubble generating apparatus produces micro-nano bubble is for 1:10-1:50.
Alternatively, the gold ion of gold adsorption system absorption described in aminoacid desorbing is used.
Alternatively, during described aminoacid includes glycine, alanine, aspartic acid, phenylalanine, leucine, histidine
One or more.
As it has been described above, the clean gold extraction element of the present invention and method, have the advantages that
(1) present invention uses micro-nano bubble to carry out gold extraction as oxidant source.Micro-nano bubble refers to bubble
Diameter micro-bubble between ten microns (μm) and tens nanometer (nm) is produced during generation.This bubble has super large specific surface
Long-pending, and the rate of climb is slow, therefore its solvability is greatly increased.The solvability of micro-nano bubble increases by 200,000 than general air
Times.Micro-nano bubble ruptures moment, the acute variation disappeared due to gas-liquid interface, and the high concentration ion that interface is gathered is by savings
Chemical energy abrupt release out, now can excite the substantial amounts of hydroxyl radical free radical of generation, and hydroxyl radical free radical has strong oxidizing property, greatly
The big leaching rate improving breeze.And owing to its bubble is minimum, considerably increase the mass-transfer efficiency of reaction.
(2) present invention also uses aminoacid avirulent to environment to carry gold agent, reusable edible, environment-protecting asepsis, waste water warp
Simple process can be discharged.And can adsorb on leaching limit, limit, improve production efficiency.
(3) relatively conventional Cyanogran. extraction of gold process, uses the clean gold extraction element of the present invention, and uses without cyanogen amino
Acid carries the process for extracting gold of gold agent and modified PAN adsorbed film can make easily to soak the leaching rate of gold mine more than 90%, can reach
95%, suitable with prior art；Can make Refractory Au-ores, its leaching rate as the most preprocessed in the Ore containing pyrite mispickel is more than
85%, and it is less than 30% without the leaching rate of such Ore tradition cyanidation technology of pretreatment, the gold extraction side of the present invention
Method is greatly improved the leaching rate of Refractory Au-ores.
(4) adsorption capacity of the modified PAN film that the present invention uses is up to 120mg/g, far above existing process activity charcoal
Adsorption capacity.
Accompanying drawing explanation
Fig. 1 is shown as the clean gold extraction element of present invention structural representation in one embodiment.
Fig. 2 is shown as the process chart of process for extracting gold of the present invention.
Element numbers explanation
1 dosing tank
2 dosing pumps
3 reactive tanks
4 centrifugal pumps
5 ceramic membrane separation systems
6 micro-nano bubble generators
7 gold medal adsorption systems
8 pH meters
9 charge doors
10 air inlets
S1～S3 step
Detailed description of the invention
Below by way of specific instantiation, embodiments of the present invention being described, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also be by the most different concrete realities
The mode of executing is carried out or applies, the every details in this specification can also based on different viewpoints and application, without departing from
Various modification or change is carried out under the spirit of the present invention.
Refer to Fig. 1 to Fig. 2.It should be noted that the diagram provided in the present embodiment illustrates this most in a schematic way
The basic conception of invention, the most graphic in package count time only display with relevant assembly in the present invention rather than is implemented according to reality
Mesh, shape and size are drawn, and during its actual enforcement, the kenel of each assembly, quantity and ratio can be a kind of random change, and its
Assembly layout kenel is likely to increasingly complex.
Embodiment 1
The present invention provides a kind of clean gold extraction element, refers to Fig. 1, is shown as the structural representation of this device, bag
Include medicine system, reactive tank 3, solid-liquid separation system, micro-nano bubble generator 6 and gold adsorption system 7.
Concrete, described reactive tank 3 is provided with pH meter 8 and charge door 9, and described charge door 9 is for adding in described reactive tank 3
Entering breeze, described pH meter 8 is for measuring the pH value of mixed liquor in reactive tank 3.
Concrete, described medicine system is connected to described reactive tank 3, for adding gold extractant to described reactive tank 3.
As example, described medicine system includes dosing tank 1 and dosing pump 2；Described dosing pump 2 is connected to described dosing tank
Between 1 and reactive tank 3.It is equipped with valve before and after described dosing pump 2, after preparing gold extractant in described drug slot 1, can
Valve before and after unlatching, utilizes described dosing pump 2 that gold extractant pumps into described reactive tank 3.
Concrete, described solid-liquid separation system is connected to described reactive tank 3 and described micro-nano air Bubble generating apparatus 6, uses
In the mixed liquor extracted in described reactive tank 3, and it is divided into two-way to export after the mixed liquor of extraction is carried out solid-liquid separation, Qi Zhongyi
Road is breeze concentrated solution, output to described reactive tank 3, and another road is the clear liquor comprising less solid, output to described micro-nano
Rice air Bubble generating apparatus 6.
As example, described solid-liquid separation system includes centrifugal pump 4 and ceramic membrane separation system 5.Described ceramic membrane separation
System 5 includes inlet, breeze concentrated solution outlet and pure water inlet；The outlet phase of described centrifugal pump 4 one end and described reactive tank 3
Even, the other end is connected to the inlet of described ceramic membrane separation system 5；The breeze concentrated solution outlet of described ceramic membrane separation system
Being connected to described reactive tank 3, pure water inlet is connected to described micro-nano air Bubble generating apparatus 6.Wherein, obtain through solid-liquid separation
The clear liquor comprising less solid by the output of described pure water inlet to described micro-nano generator 6.
Wherein, the centrifugal force that centrifugal pump (centrifugal pump) produces when referring to rotate by impeller is to carry liquid
Pump.In the present embodiment, before and after described centrifugal pump, it is equipped with valve.Set between described breeze concentrated solution outlet and described reactive tank 3
There is valve, between described pure water inlet and described micro-nano bubble generator 6, be provided with valve.
Ceramic membrane separation technique is the fluid separation process of a kind of " cross flow filter " form: material liquid is high velocity stream in membrane tube
Dynamic, under pressure-driven, the clarified permeation liquid containing small molecule component outwards passes through film, containing macromolecular components along direction normal thereto
Muddy concentrated solution be rejected by so that fluid reach separate, concentrate, the purpose of purification.
Ceramic membrane is by porosity 30%～50%, aperture 50nm～the ceramic monolith of 15 μm, use sol-gel process or
The asymmetric compound film that other technique is made.The structure of the ceramic membrane for separating is usually sandwich style: supporting layer
(also known as carrier layer), transition zone (also known as intermediate layer), film layer (also known as stratum disjunctum).Wherein the aperture of supporting layer is generally 1～20 μ
M, porosity is 30%～65%, and its effect is to increase the mechanical strength of film；The aperture of the aperture ratio supporting layer in intermediate layer is little, its
Effect is to prevent in film layer preparation process that granule is to the infiltration of porous support layer, and thickness is about 20～60 μm, and porosity is 30%
～40%；Film layer has separation function, and aperture is from 0.8nm～1 μm, and thickness is about 3～10 μm, porosity be 40%～
55%.The pore-size distribution of whole film is gradually reduced to film layer by supporting layer, forms asymmetric structure distribution.Porous ceramic film has
There are the advantages such as excellent high temperature resistant, solvent resistant, acid-proof alkaline and mechanical strength height, regenerating easily.
As example, the ceramic membrane materials that described ceramic membrane separation system 5 uses is aluminium oxide or zirconium oxide, and aperture is
0.1-1 μm, preferably 0.1-0.5 μm.Herein, the aperture of described ceramic membrane refers to the aperture of stratum disjunctum.
In another embodiment, described solid-liquid separation system may be used without cyclone form.The ultimate principle of cyclone is
Two-phase or multiphase mixture such as having the liquid-liquid of certain density contrast, liquid-solid, liquid-gas is carried out under the influence of centrifugal force point
From.Mixed liquor is tangentially entered cyclone with certain pressure, in cylindrical cavity, produces high speed rotating flow field.Mixture Midst density
Big component axially simultaneously moves downward under the effect of eddy flow field, moves radially outwards, and arrives cone segments along wall
Move downward, and discharged by underflow opening, material is thus formed outer swirling flow field；The component that density is little is transported to central axial direction
Dynamic, and form an inside vortex moved upward in axis centre, then discharged by overfall, thus reached two-phase laminated flow
Purpose.
Concrete, described micro-nano air Bubble generating apparatus 6 is connected to described solid-liquid separation system, described reactive tank 3 and institute
State gold adsorption system 7, for being mixed into air in the clear liquor from described solid-liquid separation system and producing micro-nano bubble, and
The clear liquor including micro-nano bubble is delivered to described reactive tank 3 or described gold adsorption system 7.Wherein, the oxygen in air
Gas is as oxidant.
Micro-nano bubble refer to when bubble occurs produce diameter between ten microns (μm) and tens nanometer (nm) (such as
10nm-10 μm) micro-bubble.This bubble has extra specific surface area, and the rate of climb is slow, and therefore its solvability increases
Add.The solvability of micro-nano bubble increases by 200,000 times than general air.Micro-nano bubble ruptures moment, owing to gas-liquid interface disappears
Acute variation, the high concentration ion that interface is gathered by the chemical energy abrupt release of savings out, now can excite generation big
The hydroxyl radical free radical of amount, and hydroxyl radical free radical has strong oxidizing property, is greatly improved the leaching rate of breeze.And due to its bubble
Minimum, considerably increase the mass-transfer efficiency of reaction.
As example, described micro-nano bubble generator 6 uses gas-liquid mixing pump, gas-liquid mixed than for 1:10-1:50,
It is preferably 1:10-1:20.Gas-liquid mixed pump intake can utilize suction function to suck gas, so without using air pressure
Contracting machine and vacuum pump.The impeller of pump of high speed rotating is by liquid and gas mix and blend, so without agitator and blender.
Owing to the pressurization in pump mixes, gas fully dissolves with liquid, and dissolved efficiency is up to 80～100%.So without pressurized bulk
The reaction tower of dissolving or costliness can produce high dissolution liquid.One gas-liquid mixing pump can carry out gas-liquid attraction, mixing, molten
Solve and directly deliver to high dissolution liquid use point.Therefore, use gas-liquid mixing pump can improve molten gas-liquid and produce efficiency, simplification
Device for making, save space, save operating cost and maintenance cost.
In another embodiment, described micro-nano bubble generator 6 may be used without pressure air-dissolving device, and liquid is used by it
Water pump is pressurized to 3-4kg/cm2And send into dissolving, make air be substantially soluble in liquid in tank, then through releasing in flotation tank
Putting device and reduce to suddenly normal pressure, the supersaturated air being at this moment dissolved in liquid forms micro-nano bubble.
Concrete, described gold adsorption system 7 is connected to described micro-nano air Bubble generating apparatus 6 and described reactive tank 3, is used for
Adsorbing from the gold ion in the clear liquor of described micro-nano air Bubble generating apparatus 6, the clear liquor after simultaneously inhaling gold is transmitted back to
Described reactive tank 3, it is achieved leaching limit, limit is adsorbed, improves production efficiency.
As example, described gold adsorption system 7 uses the polyacrylonitrile nanofiber film of amidoxim (to be called for short modified PAN
Film) ADSORPTION OF GOLD ion.The adsorption capacity of modified PAN film is up to 120mg/g, far above the adsorption capacity of existing process activity charcoal.
Certainly, in other embodiments, it is possible to select to use activated carbon adsorption gold ion.
Patent CN105080509A discloses the preparation method and application of a kind of nano fibrous membrane absorbent module, this nanometer
Fibrous membrane by electrostatic spinning at PET nonwoven surface composite polypropylene nitrile (PAN) nano fibrous membrane, then by this fibrous membrane hands
Work or machinery roll into wound module, finally by membrane module amidoxim.This patent have employed preparation in above patent just
Modified PAN membrane module carries out the absorption of gold ion in leachate.
As example, described gold adsorption system 7 includes that adsorption tank, described adsorption tank include and described micro-nano bubble generation dress
The charging aperture putting 6 connections and the discharging opening being connected with described reactive tank 3；The polyacrylonitrile nanofiber film of described amidoxim is put
It is placed in described adsorption tank.The polyacrylonitrile nanofiber of amidoxim in leachate enters described adsorption tank and described in submergence
Film, can realize the absorption of gold ion.Wherein, the polyacrylonitrile nanofiber film of the amidoxime being placed in described adsorption tank can
Think folded form or rolled membrane module form.
In another embodiment, described gold adsorption system 7 also can directly use described rolled membrane module, described rolled film group
Part lower end is provided with and connects 6 charging apertures connect with described micro-nano bubble generator, and upper end is provided with the discharging being connected with described reactive tank 3
Mouthful.Leachate can be entered in rolled membrane module by described charging aperture, then returns described reactive tank 3 via described discharging opening.
The clean gold extraction element of the present invention uses micro-nano bubble as oxidant source, uses ceramic membrane separation system
System or cyclone carry out solid-liquid separation, use modified PAN film to carry out gold ion absorption, it is possible to achieve leaching limit, limit is adsorbed, and improves
Production efficiency, and it is greatly improved the leaching rate of breeze.
Embodiment 2
The present invention also provides for a kind of process for extracting gold, and described process for extracting gold uses any one institute in embodiment 1
The clean gold extraction element stated.
Refer to Fig. 2, be shown as the process chart of described process for extracting gold, comprise the steps:
Step S1 is first carried out: in described reactive tank, add the powder in gold mine, and carried by gold by described medicine system
Take agent and add described reactive tank, make described breeze reach preset concentration.
Concrete, described can be any powder in gold mine containing gold mine powder, can obtain by gold containing ore is beaten powder.Described ore deposit
The mean diameter of powder is preferably 0.1-500 μm.Described gold extractant can use existing any gold extractant.The present embodiment
In, described gold extractant preferably employs without cyanogen extractant, to reduce the pollution to environment.
As example, described extractant without cyanogen comprises the aminoacid that mass fraction is 0.5%-2%, and mass fraction is
The alkali of 0.2%-2%, solvent is water.Wherein, described aminoacid includes glycine, alanine, aspartic acid, phenylalanine, bright
One or more in propylhomoserin, histidine.Described alkali includes one or more in caustic soda, quick lime, Calx.
In one embodiment, described extractant without cyanogen preferably comprises the aminoacid that mass fraction is 0.5%-1.5%,
PH value is 9-13.
In another embodiment, described extractant without cyanogen preferably comprises the aminoacid that mass fraction is 0.6%-1%, pH value
For 10-12.
As example, after adding described gold extractant, the mass fraction of breeze described in described reactive tank is 1-50%,
The present embodiment is preferably 1-30%.
Then perform step S2: close described medicine system, open described solid-liquid separation system and described micro-nano bubble produces
Generating apparatus, makes described reactive tank, solid-liquid separation system and micro-nano bubble generator form closed circuit circulatory system, carries out the leaching of gold
Go out.
Concrete, the mixed liquor in reactive tank is pumped to described solid-liquid separation system, and breeze concentrated solution returns reactive tank and enters
Row circulation, clear liquor is again introduced into reactive tank after entering described micro-nano air Bubble generating apparatus and is circulated.
This step can maintain Preset Time, such as 8-72 hour so that the gold in breeze fully leaches.In this process,
In described reactive tank, the temperature of mixed liquor is 25-80 DEG C, and preferably 40-70 DEG C, PH maintains 9-13, preferably 10-12.
As example, gas-liquid mixed ratio when described micro-nano air Bubble generating apparatus produces micro-nano bubble is for 1:10-1:
50, preferably 1:10-1:30.
Further, ozone can be added as co-oxidants by the air inlet pipe of described micro-nano air Bubble generating apparatus, or
In described reactive tank, addition hydrogen peroxide is as co-oxidants, to improve reaction rate.The concentration of oxidant is preferably at 1.1%-
1%.
Then perform step S3: open described gold adsorption system, carry out leaching and the absorption of gold of gold simultaneously.
Concrete, from the absorption of the clear liquor entrance described gold adsorption system realization gold of described micro-nano bubble, and from
Described gold adsorption system outlet returns described reactive tank and is circulated, thus realizes the absorption of leaching limit, limit.In this process, described
In reactive tank, the temperature of mixed liquor is 25-80 DEG C, and preferably 40-70 DEG C, PH maintains 9-13, preferably 10-12.
In the present embodiment, can select to close described micro-nano air Bubble generating apparatus and lead to the valve of described reactive tank, make
The clear liquor including micro-nano bubble is only delivered to described gold adsorption system.In another embodiment, it is also possible to keep this valve
Door is in opening, makes the clear liquor including micro-nano bubble be delivered to described reactive tank simultaneously and described gold absorption is
System.
The follow-up gold ion using gold adsorption system described in aminoacid desorbing to adsorb.Described aminoacid include glycine,
One or more in alanine, aspartic acid, phenylalanine, leucine, histidine.
The process for extracting gold of the present invention uses aminoacid avirulent to environment to propose gold agent, and environment-protecting asepsis, waste water is through letter
Single process can be discharged.And can adsorb on leaching limit, limit, improve production efficiency.Refractory mineral is the most preprocessed also can reach the highest
Leaching rate.
Embodiment 3
Containing sulfur gold ore, it is mainly composed of quartz 65%, kaolinite 8%, pyrophyllite 20%, pyrite 8%, economy-combat powder
After, particle diameter is less than 74 μm, fills appropriate breeze in reactive tank.In dosing tank, configuration is without cyanogen extractant, and glycine concentration is
0.75%, pH sodium hydroxide regulation to 11-12, squeezes into reactive tank by dosing pump, and control breeze concentration is 5%, and closedown adds
Teat pipette, opens ceramic membrane separation system, gas-liquid mixing pump, it is ensured that liquid-gas ratio 10:1, and pressure maintains 0.3MPa.After question response 8h,
Open valve before and after modified PAN film adsorption system, start the absorption of leaching limit, limit.After 24h, obtain the leaching rate of breeze more than 90%.
The gold of PAN film absorption can use glycine desorbing.
Embodiment 4
Containing sulfur gold ore, it is mainly composed of quartz 65%, kaolinite 8%, pyrophyllite 20%, pyrite 8%, economy-combat powder
After, particle diameter is less than 74 μm, fills appropriate breeze in reactive tank.In dosing tank, configuration is without cyanogen extractant, and glycine concentration is
0.75%, pH sodium hydroxide regulation to 11-12, squeezes into reactive tank by dosing pump, and control breeze concentration is 30%, and closedown adds
Teat pipette, opens ceramic membrane separation system, gas-liquid mixing pump, it is ensured that liquid-gas ratio 10:1, and pressure maintains 0.3MPa.Pass through gas-liquid mixed
The air inlet pipe addition ozone of pump, as co-oxidants, after addition is 0.5% question response 8h, opens modified PAN film adsorption system
Valve front and back, starts the absorption of leaching limit, limit.After 48h, obtain the leaching rate of breeze more than 90%.The gold of PAN film absorption can be with sweet
Propylhomoserin desorbing.
Embodiment 5
Arsenic-containing gold ore, its be mainly composed of quartz 85%, pyrite 5%, mispickel 10%, after economy-combat powder, particle diameter be less than 74 μ
M, fills appropriate breeze in reactive tank.In dosing tank, configuration is without cyanogen extractant, and glycine concentration is 1%, pH sodium hydroxide
Regulating to 11-12, squeeze into reactive tank by dosing pump, control breeze concentration 10%, is closed dosing pump, is opened ceramic membrane separation
System, gas-liquid mixing pump, it is ensured that liquid-gas ratio 10:1, pressure maintains 0.3MPa.Ozone is added by the air inlet pipe of gas-liquid mixing pump
As co-oxidants, after addition is 0.5% question response 8h, opens valve before and after modified PAN film adsorption system, start leaching limit, limit
Absorption.After 24h, obtain the leaching rate of breeze more than 85%.The gold of PAN film absorption can use glycine desorbing.
In sum, the clean gold extraction element of the present invention and method, have the advantages that
(1) present invention uses micro-nano bubble to carry out gold extraction as oxidant source.Micro-nano bubble refers to bubble
Diameter micro-bubble between ten microns (μm) and tens nanometer (nm) is produced during generation.This bubble has super large specific surface
Long-pending, and the rate of climb is slow, therefore its solvability is greatly increased.The solvability of micro-nano bubble increases by 200,000 than general air
Times.Micro-nano bubble ruptures moment, the acute variation disappeared due to gas-liquid interface, and the high concentration ion that interface is gathered is by savings
Chemical energy abrupt release out, now can excite the substantial amounts of hydroxyl radical free radical of generation, and hydroxyl radical free radical has strong oxidizing property, greatly
The big leaching rate improving breeze.And owing to its bubble is minimum, considerably increase the mass-transfer efficiency of reaction.
(2) present invention also uses aminoacid avirulent to environment to carry gold agent, reusable edible, environment-protecting asepsis, waste water warp
Simple process can be discharged.And can adsorb on leaching limit, limit, improve production efficiency.
(3) relatively conventional Cyanogran. extraction of gold process, uses the clean gold extraction element of the present invention, and uses without cyanogen amino
Acid carries the process for extracting gold of gold agent and modified PAN adsorbed film can make easily to soak the leaching rate of gold mine more than 90%, can reach
95%, suitable with prior art；Can make Refractory Au-ores, its leaching rate as the most preprocessed in the Ore containing pyrite mispickel is more than
85%, and it is less than 30% without the leaching rate of such Ore tradition cyanidation technology of pretreatment, the gold extraction side of the present invention
Method is greatly improved the leaching rate of Refractory Au-ores.
(4) adsorption capacity of the modified PAN film that the present invention uses is up to 120mg/g, far above existing process activity charcoal
Adsorption capacity.
So, the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The principle of above-described embodiment only illustrative present invention and effect thereof, not for limiting the present invention.Any ripe
Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by the personage knowing this technology.Cause
This, have usually intellectual such as complete with institute under technological thought without departing from disclosed spirit in art
All equivalences become are modified or change, and must be contained by the claim of the present invention.
Claims (28)
1. a clean gold extraction element, it is characterised in that: described clean gold extraction element includes medicine system, reaction
Groove, solid-liquid separation system, micro-nano bubble generator and gold adsorption system；
Wherein: described medicine system is connected to described reactive tank, for adding gold extractant to described reactive tank；
Described solid-liquid separation system is connected to described reactive tank and described micro-nano air Bubble generating apparatus, is used for extracting described reaction
Mixed liquor in groove, and it is divided into two-way to export after the mixed liquor of extraction is carried out solid-liquid separation, wherein a road is breeze concentrated solution,
Output is to described reactive tank, and another road is the clear liquor comprising less solid, output to described micro-nano air Bubble generating apparatus；
Described micro-nano air Bubble generating apparatus is connected to described solid-liquid separation system, described reactive tank and described gold adsorption system,
For being mixed into air in the clear liquor from described solid-liquid separation system and producing micro-nano bubble, and will include micro-nano
The clear liquor of bubble is delivered to described reactive tank or described gold adsorption system；
Described gold adsorption system is connected to described micro-nano air Bubble generating apparatus and described reactive tank, for absorption from described micro-
Gold ion in the clear liquor of nano bubble generator, the clear liquor after simultaneously inhaling gold is transmitted back to described reactive tank.
Clean gold extraction element the most according to claim 1, it is characterised in that: described reactive tank is provided with PH meter, is used for
Measure the pH value of mixed liquor in reactive tank.
Clean gold extraction element the most according to claim 1, it is characterised in that: described medicine system include dosing tank and
Dosing pump；Described dosing pump is connected between described dosing tank and reactive tank.
Clean gold extraction element the most according to claim 1, it is characterised in that: described solid-liquid separation system includes being centrifuged
Pump and ceramic membrane separation system；Described ceramic membrane separation system includes inlet, breeze concentrated solution outlet and pure water inlet；Described
Centrifugal pump one end is connected with the outlet of described reactive tank, and the other end is connected to the inlet of described ceramic membrane separation system；Described
The breeze concentrated solution outlet of ceramic membrane separation system is connected to described reactive tank, and pure water inlet is connected to described micro-nano bubble and produces
Generating apparatus.
Clean gold extraction element the most according to claim 4, it is characterised in that: described ceramic membrane separation system uses
Ceramic membrane materials is aluminium oxide or zirconium oxide, and aperture is 0.1-1 μm.
Clean gold extraction element the most according to claim 1, it is characterised in that: described solid-liquid separation system includes eddy flow
Device.
Clean gold extraction element the most according to claim 1, it is characterised in that: described micro-nano bubble generator bag
Include gas-liquid mixing pump or pressure air-dissolving device.
Clean gold extraction element the most according to claim 1, it is characterised in that: described micro-nano bubble a diameter of
10nm-10μm。
Clean gold extraction element the most according to claim 1, it is characterised in that: described gold adsorption system uses amidoxim
The polyacrylonitrile nanofiber film ADSORPTION OF GOLD ion changed.
Clean gold extraction element the most according to claim 9, it is characterised in that: the polyacrylonitrile of described amidoxim
Nano fibrous membrane is prepared on macromolecule non-woven fabrics.
11. clean gold extraction elements according to claim 9, it is characterised in that: the polyacrylonitrile of described amidoxim
Nano fibrous membrane is rolled membrane module form.
12. according to the clean gold extraction element described in claim 9-11 any one, it is characterised in that: described gold absorption is
System include charging aperture that adsorption tank, described adsorption tank include being connected with described micro-nano bubble generator and with described reactive tank company
The discharging opening connect；The polyacrylonitrile nanofiber film of described amidoxim is positioned in described adsorption tank.
13. clean gold extraction elements according to claim 11, it is characterised in that: described gold adsorption system is described volume
Formula membrane module, described rolled membrane module lower end is provided with the charging aperture being connected with described micro-nano bubble generator, upper end be provided with
The discharging opening that described reactive tank connects.
14. clean gold extraction elements according to claim 1, it is characterised in that: described gold adsorption system uses activity
Charcoal ADSORPTION OF GOLD ion.
15. 1 kinds of process for extracting gold, it is characterised in that: described process for extracting gold uses such as claim 1-14 any one
Described clean gold extraction element.
16. process for extracting gold according to claim 15, it is characterised in that comprise the steps:
S1: add the powder in gold mine in described reactive tank, and by described medicine system, gold extractant is added described reaction
Groove, makes described breeze reach preset concentration；
S2: close described medicine system, opens described solid-liquid separation system and described micro-nano bubble generator, makes described reaction
Groove, solid-liquid separation system and micro-nano bubble generator form closed circuit circulatory system, carry out the leaching of gold；
S3: open described gold adsorption system, carries out leaching and the absorption of gold of gold simultaneously.
17. process for extracting gold according to claim 16, it is characterised in that: in described step S3, close described micro-
Nano bubble generator leads to the valve of described reactive tank, makes the clear liquor including micro-nano bubble only be delivered to described gold
Adsorption system.
18. process for extracting gold according to claim 16, it is characterised in that: described gold extractant is to extract without cyanogen
Agent.
19. process for extracting gold according to claim 18, it is characterised in that: described extractant without cyanogen comprises mass fraction
For the aminoacid of 0.5%-2%, mass fraction is the alkali of 0.2%-2%, and solvent is water.
20. process for extracting gold according to claim 19, it is characterised in that: described aminoacid includes glycine, the third ammonia
One or more in acid, aspartic acid, phenylalanine, leucine, histidine.
21. process for extracting gold according to claim 19, it is characterised in that: described alkali includes caustic soda, quick lime, ripe
One or more in Calx.
22. process for extracting gold according to claim 16, it is characterised in that: by described micro-nano air Bubble generating apparatus
Air inlet pipe add ozone as co-oxidants.
23. process for extracting gold according to claim 16, it is characterised in that: in described reactive tank, add hydrogen peroxide make
For co-oxidants.
24. process for extracting gold according to claim 16, it is characterised in that: in described step S1, add described Huang
After gold extractant, the mass fraction of breeze described in described reactive tank is 1-50%.
25. process for extracting gold according to claim 16, it is characterised in that: in described step S2 and step S3, institute
Stating the temperature of mixed liquor in reactive tank and be 25-80 DEG C, PH maintains 9-13.
26. process for extracting gold according to claim 16, it is characterised in that: described micro-nano air Bubble generating apparatus produces
Gas-liquid mixed during micro-nano bubble is than for 1:10-1:50.
27. process for extracting gold according to claim 16, it is characterised in that: use gold absorption system described in aminoacid desorbing
The gold ion of system absorption.
28. process for extracting gold according to claim 27, it is characterised in that: described aminoacid includes glycine, the third ammonia
One or more in acid, aspartic acid, phenylalanine, leucine, histidine.
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| CN107156347A (en) * | 2017-05-15 | 2017-09-15 | 赵健 | It is a kind of to be used for reducing blood lipid, health protection tea of blood pressure and preparation method thereof |
| CN107674994A (en) * | 2017-09-22 | 2018-02-09 | 长春黄金研究院 | A kind of nontoxic while Leaching of Gold of cleaning, the method for copper |
| CN108085497A (en) * | 2017-12-01 | 2018-05-29 | 上海铀金信息科技有限公司 | The extracting method of gold element in a kind of electronic waste |
| CN108220594A (en) * | 2016-12-14 | 2018-06-29 | 北京有色金属研究总院 | A kind of method for improving gold mine gold leaching rate in the golden system of alkaline thiourea leaching |
| CN112717863A (en) * | 2020-11-19 | 2021-04-30 | 中国恩菲工程技术有限公司 | Gas-liquid reaction system and hydrometallurgical equipment with same |
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| CN108220594A (en) * | 2016-12-14 | 2018-06-29 | 北京有色金属研究总院 | A kind of method for improving gold mine gold leaching rate in the golden system of alkaline thiourea leaching |
| CN107156347A (en) * | 2017-05-15 | 2017-09-15 | 赵健 | It is a kind of to be used for reducing blood lipid, health protection tea of blood pressure and preparation method thereof |
| CN107674994A (en) * | 2017-09-22 | 2018-02-09 | 长春黄金研究院 | A kind of nontoxic while Leaching of Gold of cleaning, the method for copper |
| CN108085497A (en) * | 2017-12-01 | 2018-05-29 | 上海铀金信息科技有限公司 | The extracting method of gold element in a kind of electronic waste |
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| CN113209666A (en) * | 2021-06-17 | 2021-08-06 | 浙江大学 | Preparation method and application of ionic liquid solution containing nano bubbles |
| CN113667844A (en) * | 2021-08-23 | 2021-11-19 | 南华大学 | Device and method for leaching sandstone uranium ore through micro-nano bubble oxidation |
| CN113667844B (en) * | 2021-08-23 | 2022-09-27 | 南华大学 | Device and method for leaching sandstone uranium ore through micro-nano bubble oxidation |
| CN116656957A (en) * | 2023-08-01 | 2023-08-29 | 河北双兴摄影化学有限公司 | Gold leaching solution capable of reducing dosage of thiosulfate and application method of gold leaching solution |
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